Super austenitic stainless steel welding technology and subsequent heat treatment process thereof

A technology of austenitic stainless steel and welding technology, applied in heat treatment furnaces, heat treatment equipment, welding equipment, etc., can solve the problems of corrosion resistance, cumbersome performance, and easy bending that are prone to cracks, so that it is not easy to bend and cracks, The effect of simple welding steps and strong firmness

Inactive Publication Date: 2016-07-13
SHANGHAI KAIQUAN PUMP IND GROUP
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Problems solved by technology

[0002] Super austenitic stainless steel, like other commonly used Cr-Ni austenitic steels, has good cold and hot workability, but the welding and post-weld heat treatment steps of super austenitic stainless steel are relatively cumbersome and the properties after welding are relatively Poor, easy to bend after welding, prone to cracks and reduced corrosion resistance

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  • Super austenitic stainless steel welding technology and subsequent heat treatment process thereof
  • Super austenitic stainless steel welding technology and subsequent heat treatment process thereof

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Embodiment Construction

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further elaborated.

[0024] A kind of super austenitic stainless steel welding process provided by the present invention, described welding process comprises the following steps:

[0025] (1) Select the super austenitic stainless steel plate, the super austenitic stainless steel plate is in the form of V-shaped bevel with edge, the specification is 10mm×150mm×700mm, the model is SA240-S31254, the specific composition of the super austenitic stainless steel plate As shown in the following table:

[0026]

[0027] (2) Select SFA5.14-ERNiCrMo-3 welding wire and adopt tungsten argon arc welding method to conduct multi-layer welding of super austenitic stainless steel plate at 1G horizontal position. When welding, try to use small line energy and control interlayer temperature At less than 80°C, the specific compo...

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Abstract

The invention discloses a super austenitic stainless steel welding technology; the welding technology comprises the following steps: (1) selecting a super austenitic stainless steel sheet; (2) selecting an SFA5.14-ERNiCrMo-3 welding wire to carry out multilayer pass welding on the super austenitic stainless steel sheet at a 1G horizontal position by a tungsten argon arc welding method, wherein interlayer-temperature is lower than 80 DEG C; (3) adopting a direct current (DC) power supply during welding, wherein polarity is welding wire connection, the specification of the welding wire is phi 1.2mm, welding current is 90-110A, welding voltage is 16-20V, welding speed is 100-120mm/ min, protective gas in a welding gun and at the back of the welding gun is Ar gas, and the purity of the Ar gas is more than 99.997 percent. According to the super austenitic stainless steel welding technology and a subsequent heat treatment process of the welding technology, welding steps and post-weld heat treatment steps are simpler, and the post-weld super austenitic stainless steel sheet is enabled to be high in firmness, not to be easily bended and not to easily have cracks, so that the corrosion resistance of the super austenitic stainless steel sheet is guaranteed.

Description

technical field [0001] The invention relates to a stainless steel welding process, in particular to a super austenitic stainless steel welding process and subsequent heat treatment process. Background technique [0002] Super austenitic stainless steel, like other commonly used Cr-Ni austenitic steels, has good cold and hot workability, but the welding and post-weld heat treatment steps of super austenitic stainless steel are relatively cumbersome and the properties after welding are relatively Poor, easy to bend after welding, prone to cracks and reduced corrosion resistance. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a super austenitic stainless steel welding process and subsequent heat treatment process. [0004] To achieve the above object, the technical scheme of the present invention is as follows: [0005] A super austenitic stainless steel welding process is characterized in that the welding p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/095B23K33/00C21D9/50
Inventor 吴天笑张志善
Owner SHANGHAI KAIQUAN PUMP IND GROUP
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